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During our last webinar, we covered some of the basic ideas behind ggplot2, the R Visualization package by Dr. Hadley Wickham. In this blog post I will walk through the example that I covered during the webinar. In order to carry out the examples yourself, you may download the dummy datasets from this link Creating

or, Is the Seattle Mariners outfield a disaster?The BackstoryEarlier this week (2013-06-10), a blog post by Dave Cameron appeared at USS Mariner under the title “Maybe It's Time For Dustin Ackley To Play Some Outfield”. In the first paragraph, Cameron describes to the Seattle Mariners outfield this season as “a complete disaster” and Raul Ibanez as...

Occasionally I find myself wanting to draw several regression lines on the same plot, and of course ggplot2 has convenient facilities for this. As usual, don’t expect anything profound from this post, just a quick tip! There are several reasons we might end up with a table of regression coefficients connecting two variables in different

In a recent tutorial in the eLife journal, Huang, Rattner, Liu & Nathans suggested that researchers who draw scatterplots should start providing not one but three regression lines. I quote, Plotting both regression lines gives a fuller picture of the data, and comparing their slopes provides a simple graphical assessment of the correlation coefficient. Plotting

A client has a specific audit they perform quarterly across 200 of their manufacturing plants. The audit has 8 distinct sections examining the different areas of the plant (shipping, receiving, storage, packaging,etc.) Instead of having one cumulative final score, the audit displays a final score for each section. I wanted to examine the distribution of

Data from slides on Bloomberg businessweek's site: http://images.businessweek.com/slideshows/2012-09-26/americas-50-best-citiesIn this post, I show how one can interact with a dataset and generate graphs on the fly (technically, I've predetermined...

Data from: http://images.businessweek.com/slideshows/2012-09-26/americas-50-best-citiesThis time, I used ggplot2 to recreate the graphs created previously using Tableau. After all, R and ggplot2 are open source and free. Yes, I could leave a space...

My friend Jonah asked me to guest lecture in his R seminar aimed at grad students and postdocs in Integrative Biology. I gave Jonah a bunch of topic options ranging from reproducible research with R to data manipulation. The consensus was data visualization so I put together a 2 hour talk/hands on presentation for ggplot2

The new version of R was released yesterday. As I understand it, the numbering change to 3.0 represents the recognition that R had evolved enough to justify a new number rather than the addition of many new features. There are some important new featur...